http://www.vlf.it/vinassa2/ground-loop-breaker.html
This article is about removing noise and distortion from transformer isolation devices for weak VLF signals. I have a shallow understanding but it does an interesting detailed deep dive to design an excellent solution.
This article is about removing noise and distortion from transformer isolation devices for weak VLF signals. I have a shallow understanding but it does an interesting detailed deep dive to design an excellent solution.
That's an interesting paper.
I wonder why the author Alessandro Vinassa hasn't done other electronic pages.
I wonder why the author Alessandro Vinassa hasn't done other electronic pages.
He could extend the low frequency limit all the way down to DC if that is important.
Simply install a 16 bit A-to-D at the sensor, send the data digitally to the receiver using whichever serial data communication protocol you like, and do a 16 bit D-to-A at the receiver. In this scheme the galvanic isolation is provided by the serial data transceivers. Some use pulse transformers, some use AC coupling capacitors, and some use optoisolators. Of course for maximum bragging rights you could send the data over a fiber optic cable (excellent galvanic isolation) via TOSLINK transmitter and receiver.
Simply install a 16 bit A-to-D at the sensor, send the data digitally to the receiver using whichever serial data communication protocol you like, and do a 16 bit D-to-A at the receiver. In this scheme the galvanic isolation is provided by the serial data transceivers. Some use pulse transformers, some use AC coupling capacitors, and some use optoisolators. Of course for maximum bragging rights you could send the data over a fiber optic cable (excellent galvanic isolation) via TOSLINK transmitter and receiver.
The Jensen website also has good info on it regarding implementation of their input and output transformers. I frequently use their transformers in alot of my audio projects, especially for converting unbalanced to balanced and vice versa. Its a much better noise free, wide band solution compared to noisy, distorting op amps.
Current driving an audio transformer and secondarily doing a current to voltage conversion is an old trick . Meyer sound used it in it`s products.
Great article. Is it describing the Zero Field principle, similar to this?
https://www.lundahltransformers.com/wp-content/uploads/datasheets/6404.pdf
https://www.lundahltransformers.com/wp-content/uploads/datasheets/6404.pdf
some us dc coupling at the secondary, resulting in a larger offset at the output, but easier to remove afterwards, instead of a large cap at the transformer secondary.
You'd want to avoid the cap when using transformer coupled outputs. IMO thats the main reason why you'd want to use transformers to begin with.
Now if I was going to build a circuit, I would:
And a passive/impedance output to the source.
And use a THAT Corp balanced input chip.
And a passive/impedance output to the source.
And use a THAT Corp balanced input chip.